REVOLVING CREDIT FACILITIES, LINES OF CREDIT, SHORT-TERM BORROWINGS, AND LONG-TERM DEBT (Entergy Corporation, Entergy Arkansas, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) (Schedule of Long-Term Debt Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Book Value of Long-Term Debt	$ 34,680,326	$ 30,277,161
Fair Value of Long-Term Debt	30,559,050	28,208,822
ENTERGY ARKANSAS, LLC
Debt Instrument [Line Items]
Book Value of Long-Term Debt	5,833,654	5,423,604
Fair Value of Long-Term Debt	4,924,561	4,931,734
ENTERGY LOUISIANA, LLC
Debt Instrument [Line Items]
Book Value of Long-Term Debt	12,606,594	10,366,835
Fair Value of Long-Term Debt	10,976,437	9,510,545
ENTERGY MISSISSIPPI, LLC
Debt Instrument [Line Items]
Book Value of Long-Term Debt	3,666,555	3,021,324
Fair Value of Long-Term Debt	3,151,934	2,755,286
ENTERGY NEW ORLEANS, LLC
Debt Instrument [Line Items]
Book Value of Long-Term Debt	661,298	656,849
Fair Value of Long-Term Debt	612,753	621,670
ENTERGY TEXAS, INC.
Debt Instrument [Line Items]
Book Value of Long-Term Debt	4,313,131	4,030,188
Fair Value of Long-Term Debt	3,756,229	3,780,405
SYSTEM ENERGY RESOURCES, INC.
Debt Instrument [Line Items]
Book Value of Long-Term Debt	1,173,454	1,088,703
Fair Value of Long-Term Debt	$ 1,134,566	$ 1,104,007